Display screen or portion thereof with a graphical user interface



FIG. 1 is a face view of a first embodiment of a design for a display screen or portion thereof with a graphical user interface;

FIG. 2 is a face view of a second embodiment of a design for a display screen or portion thereof with a graphical user interface;

FIG. 3 is a face view of a third embodiment of a design for a display screen or portion thereof with a graphical user interface;

FIG. 4 is a face view of a fourth embodiment of a design for a display screen or portion thereof with a graphical user interface;

FIG. 5 is a face view of a fifth embodiment of a design for a display screen or portion thereof with a graphical user interface; and,

FIG. 6 is a face view of a sixth embodiment of a design for a display screen or portion thereof with a graphical user interface.

The line dot line showing of a display screen or portion thereof, form no part of the claimed design. The text “notify someone” in FIG. 1, “assign a team as assignee” in FIG. 2, “create item” in FIG. 3, “Notify someone every time period” in FIG. 4, “to something archive the item” in FIG. 5, “Notify someone every time period” in FIG. 6 and other elements shown in dotted line, form no part of the claimed design. All other text, numerals and other elements, excluding those shown in dotted line, are part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 